Normal-sized CD in LP-style sleeve with a seventeen and a half minute piece made in 1974 using raw and prepared piano material, strongly transformed through tape manipulation, and thus retaining many of the performative and musical qualities of the original material. An extremely good example of the aesthetic and imaginative qualities of this genre at a time when it was still marginal and attracted interesting people with ideas. It works because of - and not despite - its limitations, exploring a narrow field with rigour and elan. A modest gem.